Question

упрости выражение(даю 50 баллов)

Answer 1

$\displaystyle\bf\\\frac{6y-y^{2} }{4+y} :\frac{y^{2} }{y+4} =\frac{y(6-y)}{4+y} \cdot\frac{y+4}{y^{2} } =\frac{6-y}{y} \\\\\\y=3,2\\\\\\\frac{6-y}{y} =\frac{6-3,2}{3,2} =\frac{2,8}{3,2}=0,875\\\\\\Otvet:0,875 :$